Bath sponge



FIG. 1 is a top plan view of a bath sponge showing my new design;

FIG. 2 is a side view thereof, the opposite side being identical to this side view;

FIG. 3 is an end view thereof, the opposite end being identical to this end view; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a bath sponge, as shown and described. 